Photovoltaic PVDF membrane

Since DuPont successfully developed polytetrafluoroethylene (PTFE) in 1938 and gradually industrialized it, the types of fluororesins have been continuously increasing. Currently, the mainstream fluororesins include PTFE, PCTFE, PVDF, PVF, etc.
Thin films made of fluororesin have the characteristics of soft texture, good gloss, and transparency, and are widely used in fields such as solar power generation, building film structures, and pharmaceutical packaging. Fluorine film is a high value-added product in the fluorine chemical industry. This article summarizes the common application areas of PVDF membranes, providing reference for the application of PVDF membranes.

In the field of solar cells
Against the backdrop of promoting energy conservation and emission reduction worldwide, solar energy, as the fastest-growing and most promising new energy source, has received support from various policies and funds.
Photovoltaic backsheet, as a critical protective material for photovoltaic modules, plays a crucial role in the service life of the modules. Years of practice have proven that using fluorine film as a protective film material for the outer layer of the backboard has become the mainstream choice in the market, and PVDF film and PVF film are the main fluorine film materials used. PVDF membrane has good performance and relatively inexpensive raw materials, making it a latecomer.

In the field of life sciences

Western Blot is a protein detection technology that transfers the total protein of cells or tissues separated by electrophoresis from the gel to the solid phase support transfer membrane, and then uses specific antibodies to detect a specific antigen. It has been widely used in many aspects such as gene expression research at the protein level, antibody activity detection and early disease diagnosis.

The transfer film based on PVDF membrane was first introduced by M company in 1985. Compared with traditional nitrocellulose membranes, PVDF membranes have superior performance in protein retention, mechanical strength, and chemical compatibility. Moreover, PVDF membrane is the only choice for protein sequencing. Because PVDF membrane has good chemical resistance and can adapt to "harsh" cleaning conditions, nylon or nitrocellulose membranes will degrade under the same conditions.

Environmental protection field
It is understood that only about 0.01% of the total international water supply is available for human use, and the water crisis is constantly worsening. And with the acceleration of climate change, population growth, and global urbanization, the availability of water is constantly decreasing. Wastewater treatment technology, as an important issue in the field of environmental protection, has broad development space. In the process of water treatment, PVDF membrane is often used for pre-treatment of sewage, seawater desalination, etc., to remove impurities such as macromolecules, bacteria, and sediment.

At present, the mainstream ultrafiltration products used for large-scale water treatment worldwide are divided into two main materials: PVDF and polyethersulfone (PES). The important advantage of PVDF is that its chemical stability is much better than that of polyether sulfone materials, especially its ability to withstand oxidative cleaning. And oxidant cleaning is the main means to solve organic fouling and blockage of ultrafiltration membranes, so PVDF ultrafiltration membranes are more durable and have a more stable long-term flux.